单项选择题

What type of protection is implemented when the DBA issues the ALTER DATABASE SET STANDBY DATABASE PROTECTED； command？（）

A.The standby database is protected against write operations.
B.The primary database is protected against write operations.
C.The primary database is protected against data loss and data divergence.
D.The standby database is protected against data loss and data divergence.

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What is the new Oracle Shared Server?（）

A.An improved version of multithreaded server configuration.
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